Year: 2023
Type: preprint
Abstract: The Celestial Holography program encompasses recent efforts to understand the flat space hologram in terms of a CFT living on the celestial sphere. A key development instigating these efforts came from understanding how soft limits of scattering encode infinite dimensional symmetry enhancements corresponding to the asymptotic symmetry group of the bulk spacetime. Historically, the construction of the bulk-boundary dual pair has followed bottom up approach matching symmetries on both sides. Recently, however, there has been exciting progress in formulating top down descriptions using insights from twisted holography. This chapter reviews salient aspects of the celestial construction, the status of the dictionary, and active research directions. This is a preprint version of a chapter prepared for the Encyclopedia of Mathematical Physics 2nd edition.
Source: arXiv (Cornell University)
Author: Pasterski, Sabrina
Institution: Perimeter Institute
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4387582981